Vision tester



FIG. 1 is a perspective view of a vision tester showing our new design.

FIG. 2 is a front elevational view thereof;

FIG. 3 is a back elevational view thereof;

FIG. 4 is a side elevational view thereof;

FIG. 5 is a top plan view thereof;

FIG. 6 is a bottom plan view thereof.

The ornamental design for a vision tester, as shown.